181060989 has 4 divisors (see below), whose sum is σ = 241414656. Its totient is φ = 120707324.

The previous prime is 181060973. The next prime is 181061039. The reversal of 181060989 is 989060181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 181060989 - 2⁴ = 181060973 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 181060989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181060189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30176829 + ... + 30176834.

It is an arithmetic number, because the mean of its divisors is an integer number (60353664).

Almost surely, 2^181060989 is an apocalyptic number.

It is an amenable number.

181060989 is a deficient number, since it is larger than the sum of its proper divisors (60353667).

181060989 is an equidigital number, since it uses as much as digits as its factorization.

181060989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60353666.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 181060989 is about 13455.8904945009. The cubic root of 181060989 is about 565.7288101803.

The spelling of 181060989 in words is "one hundred eighty-one million, sixty thousand, nine hundred eighty-nine".